Biology Chapter 11 Bio Energetic Mcqs Test Online Punjab Class 11th

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Question 1 of 10

Biology

1. In C₃ plants first stable product of photosynthesis during dark reaction is:

PGAL

PGA

Oxaloacetate

RuBP

Question 1 of 10

Question 2 of 10

2. What are the products of the light reactions in photosynthesis?

ATP, PGA and oxygen

ATP, PGA and NADH₂

ATP, NADPH₂ and oxygen

ATP and NADP

Question 2 of 10

Question 3 of 10

3. Carbon dioxide labeled with ¹⁴C has been used to identify the intermediate compounds in the Calvin cycle, the light-independent stage in photosynthesis. Which compound would be the first to contain the ¹⁴C?

PGA

Starch

Glucose

RuBP

Question 3 of 10

Question 4 of 10

4. In C₄ plants, fixation of CO₂ occurs in

Palisade tissue

Spongy mesophyll and bundle of sheath

Phloem tissue

Cortex of stem

Question 4 of 10

Question 5 of 10

5. During the light dependent stage of photosynthesis, the photo activated pigment removes an electron from the hydroxylation derived from the water molecule. The fate of the free hydroxyl radical is that it:

Is used to produce adenosine triphosphate from adenosine diphosphate

Is used to raise the activation level of chlorophyll by donating positive charge

Is broken down into oxygen and a free radical of hydrogen

Reduces carbon dioxide to sugar

Question 5 of 10

Question 6 of 10

6. Removal of the source of carbon dioxide from photosynthesizing chloroplasts results in rapid changes in the concentration of certain chemicals.

Which one of the following represents the correct combination of concentration changes?

	ATP	Ribulose bishposphate	Phosphoglyceric acid (PGA)
A	Decreases	Decreases	Increases
B	Decreases	Increases	No change
C	Increases	Increases	Decreases
D	Increases	No change	Increases

C

B

A

D

Question 6 of 10

Question 7 of 10

7. During dark reactions the three carbon atoms of 3-PGA are derived from

RuBP only

CO₂ only

RuBP + CO₂

RuBP + CO₂ + PEP

Question 7 of 10

Question 8 of 10

8. Photo respiration takes place only in

All cells of the plant

Green parts of the plant

Root

Mitochondria

Question 8 of 10

Question 9 of 10

9. Chlorophyll is soluble in

Not in any solvent

Water

Organic solvent

Water and organic solvent

Question 9 of 10

Question 10 of 10

10. ATP synthesis during light reactions is

Oxidative

Photolysis

Substrate phosphorylation

Photophosphoryation

Question 10 of 10

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